optigraph
Op"ti*graph, n. Etym: [Optic + -graph: cf. F. opticographe. See Optic, a. ] Defn: A telescope with a diagonal eyepiece, suspended vertically in gimbals by the object end beneath a fixed diagonal plane mirror. It is used for delineating landscapes, by means of a pencil at the eye end which leaves the delineation on paper.